Cooking Compartment Controls - Vulcan-Hart VSX24G Service Manual

VSX BOILER BASE SERIES CONVECTION STEAMERS - STEAMER OPERATION
3. Manual Blowdown (All Models)
A. Turn power switch OFF.
B. Open blowdown valve located on the bottom
front of the cabinet base.
C. After the boiler has completely drained,
close blowdown valve and turn fill switch to
ON and allow boiler to fill.

Cooking Compartment Controls

NOTE: If a cooking timer is set immediately after the
ready light comes on, a loud clanking sound will be
heard (oil canning) and the ready lights will flash for
several seconds. This condition is caused by the
manifold pressure being on the "fringe" of the pressure
switch set point. When a cook timer is set, the
compartment steam solenoid valve opens causing the
manifold steam pressure to drop, slightly below the
pressure switch set point. At the same time, steam
pressure is still increasing in the boiler. This opposing
condition causes a pressure "bounce" to occur but
after the steam pressure passes approximately 4 psi
this condition subsides. Under normal steam cycling
pressures, this condition will not be seen.
When the steam pressure in the cooking compartment
manifold reaches approximately 3 psi:
• The cooking compartment pressure switch
closes and supplies power to the other controls.
• The ready lights will illuminate.
After approximately one minute, the steam pressure
in the boiler will reach the upper limit of 10 psi. If the
pressure drops below approximately 3 psi, the
pressure switch will open, removing power from the
cooking compartment controls.
1. With both timer knobs at the off position, open the
compartment doors and observe that no steam
has entered the cooking compartments, then
close the doors.
2. Set both timer knobs at 2 minutes. The ready
lights will go off, the cooking lights will come on,
and steam will begin to enter the compartments.
3. After one minute, open each door and observe
that steam has ceased to enter each
compartment, cooking lights go back to ready,
and one minute is remaining on each cook timer.
4. Close doors and steam generation and cook
timing will resume. Observe the floor drain to
ensure that live steam from compartments is
being cooled by cold water from the cold water
condenser solenoid valve.
NOTE: To silence buzzers, turn timer knobs to off
position.
5. When timer knobs reach "0"
• Buzzers will sound.
• Steam generation will stop.
• Cooking lights will go off.
• Ready lights will come on.
NOTE: On direct steam units, no steam cycling will
occur due to the regulated constant steam supplied
from the building. Steam will come on for cooking
when a cook timer is set and go off at the end of that
time.
6. During a cooking cycle, the heating system will
cycle on and off as necessary to maintain steam
pressure in the boiler.
7. Turn power switch off to remove power from the
steamer and the red light will go out.
8. Blowdown the boiler. See Boiler Blowdown and
Steamer Shut Off.
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